Finding the Fourth Proportional to 1,357.76, 1,873.76 and 768.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.76 : 1,873.76 = 768.32 : x
2. Step 2: Convert to fraction form
   1,357.76/1,873.76 = 768.32/x
3. Step 3: Cross multiply
   1,357.76x = 1,873.76 × 768.32
4. Step 4: Simplify right side
   1,357.76x = 1,439,647.28
5. Step 5: Solve for x
   x = 1,439,647.28/1,357.76
6. Step 6: Final answer
   x = 1,060.31